Published October 2006 | Version v1
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Physics of electron internal transport barrier in toroidal helical plasmas

Creators

  • 1. National Inst. for Fusion Science, Toki, Gifu (Japan)
  • 2. Kyushu Univ., Research Inst. for Applied Mechanics, Kasuga, Fukuoka (JP)
  • 3. Kyoto Univ., Dept. of Nuclear Engineering, Kyoto (JP)
  • 4. Dept. of Physics, UCSD, San Diego, CA (US)

Description

The role of zonal flows in the formation of the transport barrier in the helical plasmas is analyzed using the transport code. A set of one-dimensional transport equations is analyzed, including the effect of zonal flows. The turbulent transport coefficient is shown to be suppressed when the plasma state changes from the weak negative radial electric field to the strong positive one. This bifurcation of the turbulent transport is newly caused by the change of the damping rate of zonal flows. It is theoretically demonstrated that the damping rate of zonal flows governs the global confinement in toroidal plasmas. (author)

Availability note (English)

Available from INIS in electronic form

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Additional details

Publishing Information

Imprint Pagination
10 p.
Report number
NIFS--869

Conference

Title
21. IAEA fusion energy conference
Dates
16-21 Oct 2006
Place
Chengdu (China)

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
38115722
Subject category
S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
BIFURCATION; CHARGED-PARTICLE TRANSPORT; CHARGED-PARTICLE TRANSPORT THEORY; COMPUTERIZED SIMULATION; DIFFUSION BARRIERS; ELECTRIC FIELDS; ELECTRON TEMPERATURE; ELECTRONS; HELICAL CONFIGURATION; LHD DEVICE; NONLINEAR PROBLEMS; PLASMA; PLASMA CONFINEMENT; PLASMA RADIAL PROFILES; THERMAL DIFFUSIVITY; TURBULENCE; TURBULENT FLOW
Descriptors DEC
CLOSED PLASMA DEVICES; CONFIGURATION; CONFINEMENT; ELEMENTARY PARTICLES; FERMIONS; FLUID FLOW; LEPTONS; PHYSICAL PROPERTIES; RADIATION TRANSPORT; SIMULATION; THERMODYNAMIC PROPERTIES; THERMONUCLEAR DEVICES; TRANSPORT THEORY

Optional Information

Notes
18 refs., 8 figs.